The main coat color types of pigs
Pigs have many types of coat color, mainly due to the different types and distribution of melanin. There are two kinds of melanin, eumelanin, which exists in black and brown forms, and brown melanin, which exists in yellow and red forms. Melanin is a binding protein, all kinds of pigs contain it, but the amount and distribution of different, such as white Yorkshire pig hair content of 0.07%, black pigs contain 6.18%. Pigs have the following main types of coat color.
1. White This type of pig hair is white, such as Yorkshire pigs, Landrace and so on.
2. Pure black coat is black, many local pig species in China, such as Min pig, Bamei pig, Huanghuaihai black pig, Neijiang pig, Wei pig, Huai pig, etc.; British Bakxia pig and American wave pig belong to this category.
3. White Belts These pigs have white fur on the waist or neck and shoulders, and black at both ends of the body. Jinhua pig, two black pigs in central China, Ningxiang pig and Hampshire pig in the United States belong to this category.
4. Brownish red This kind of pig whole body is brownish red or golden yellow, such as Yunnan Dahe pig in Wujin pig type of our country, Coke pig in Guizhou, Duroc pig in the United States, Tamworth pig, etc.
5. There are many pig breeds with this kind of hair color in China, such as Guangdong large flower pig, Jiangxi central and southern flower pig, Wanzhe flower pig, Minbei flower pig, pan-agricultural flower pig, Beijing flower pig, Taiyuan flower pig and Belgian Pitlan pig. The proportion of black and white spots varies among pig breeds.
6. Dirty white This kind of pig hair color is white and dirty gray, such as Mongolian pigs, Hungarian Manglica pigs, etc.
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Chicken sulfonamides poisoning
Among the sulfonamides, especially those that are easily absorbed in the intestinal tract, such as sulfadiazine (S day), sulfamethazine (SM2), sulfamethoxazine (SMM), sulfaquine (SQ) and sulfamethoxypyridazine (SMP), their therapeutic dose is close to that of poisoning. In the prevention and treatment of parasitic parasitic diseases in poultry, sufficient doses and continuous use of drugs must be used in order to be effective, otherwise protozoa are prone to drug resistance. Therefore, there are some factors, such as large dosage or long duration, uneven mixing in added feed and so on.
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Ingenious trick of feed formula for pigs during lactation
During the lactation period, sows need a lot of nutrients to satisfy lactation. During the peak lactation period, the lactation ability of sows is greater than that of feed intake and less than the amount of nutrients excluded from milk, and the body condition of sows decreases rapidly. feeding lactating sows with high quality and high nutrient concentration feed is the best way to solve this contradiction. feed formula 1: table 4, color 3, lactation feed formula 1 avoids the use of large solvent feed such as alfalfa as far as possible. Unified bran, etc. In the formula design of lactation feed, the unknown factor of nutrition is not very important.
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